Additional information about delirium can be found in:

American Delirium Society

https://www.americandeliriumsociety.org/what-delirium

https://www.americandeliriumsociety.org/family-guidance 

Hospital Elder Life Program (HELP)

http://www.hospitalelderlifeprogram.org/for-family-members/

Nursing world

nursingworld.org 

http://www.nursingworld.org/MainMenuCategories/ThePracticeofProfessionalNursing/Delirium/Resources.html